Milling attachment for lathes



Sept. 8, 1953 c. scHLAGEL MILLING ATTACHMENT FOR LATHES Filed Nov. 19, 1948 .Q SheetS-Sheet 1 FIG l 7o cmums sc'HLAcEL 47 O I all 2 |/8 55% .w 3 667. 6 7 O a@ n n 5 9|7 856 8 Il 2 9 2 5 8 9 4 8 9 2 5 2, 2

sept. s, 1953 SCHLAGEL MILLING ATTACHMENT FOR LATHES 2 Sheets-Sheet 2 Filed Nov. 19, 1948 FIG. 7.

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2 2 2 m b m AM Q Patented Sept. 8, A1953 UNITED STATES PATENT OFFICE;

2,651,239, MILLING ATTACHMENT FOR LATHES Charles Schlagel, Inglewood, Calif. Application November 19, 1948, Serial No. 61,038

2 Claims.

Thiszinvention has to do, generally, with attachmentsv for. lathes, and particularly with a milling attachment therefor.

An object of this inventionisto provide a new and improved self-driven milling attachment for lathes, whichA canbe readily attachedto a lathe in a-V minimum of time.

Another object is to provide a, milling attachment" adapted to .be mounted on the cross-feed .orcompound'rest ofthe lathe Vandswhich will mill the1 full length and swing of the lathe.

A further object of the invention is to providefv a: devicewhich is adjustable independently ofi the. latheV element on. which the device is mounted, both. vertically and rotatably, to variousra'diiof; a; pivotali axis parallel to theV turning: axis of the lathe.

Another-object is to provide a milling attachment; for lathes, having a milling element adapted;tobe.mounted on the'- lathe and including a: means for adjustably mounting a motor on said element; In this connection it is also an'` object to provide' such a: device inwhich the motor mounting means permits ofthe adjustment of themotorxtowardsand away from the milling element. so that a boltA drive may be'used between the: tjwo-- and adjustment madethereof.

These andother objectswill be apparent from thezdrawingsV and the-.following description thereof; Referring. tothe drawings, whichl are for illustrative purposes only:

Fig.A 1 isa fragmentaryu elevational View of a lathe showingthemillingattachment of. the invention mountedthereon;

Fig; 2 is ai fragmentary sectional elevational viewrof the milling attachment ofthe invention;

Eig. 3fiseasectional view online-3 3 of4 Fig. 2;

Eig. liisv a sectionon'line4-4of Fig. 2;

Fig. 5 isa plan View, partlyVA broken away, of the milling attachment;

`Eig-.161s a. fragmentary elevational view of a modied form of attachment means for securing the milling elementto` the supportingbracket;

Fig. 7 is a sectionalview on line 1--1 of Fig. 6;

Fig. 8 is-a' viewsimilar to Fig. 6- of another modification; and

Fig: 9 isa sectional view on'the line` 9-9 of Fig.' 8.'

More particularly describing the invention, the invention, the milling attachment; indicated generally by I0, is shown mountedv on an engine lathe I I, having the bed I2; head stock I 3; and tail stock I4. The lathe is shown as being providediwith the ordinary carriage-I 5, which travels on the screw I6. On the carriage'is a cross-feed I .1rwhich supports a compound-rest I8.

The milling attachment` II'I` isfshown mounted on a. compound rest. However, it will be apparent that it may be supportedon the carriage in; anysuitable manner.

Referring now particularly: to Figs. 2: andl 5,

2` inclusive, the milling attachment I0 comprises; generally, a mounting bracket 20, a milling.y elet-.- ment 2 I, and a motor 22. The mounting-bracket 20may be an L angle, having a shortv base leg 25 and an upright legl 26. The base may be secured to the compound rest I8 or other desiredparti-of the `latheby means of one or more T bolts-.28:

The milling element 2I includes a milling cutter; housing which includes a tubular" spindle housing 3| having a mounting flange 32 near the lower end at one side thereof; The ilangel 32;,in the form of the invention shown in Figs. 1 to 5, is provided with two sets of two parallel grooves 33 each, the sets being disposed at right` angles to each other and adapted, respectively, to` re.- ceive two vertical ribs 34 formed' on the leg-26 of the mounting bracket. A threaded stud 38 and a nut 3l serve to secure the ilange` to-thezleg 2.6 of the mounting bracket lin either the position shownV or at right angles t ereto as will be apparent. y

The bolt 36 extends through a vertical slotfY in the mounting bracket and through any selected hole 39 of an adjusting bar'46. The bar 40-is mounted for accurate, vertical adjustment on the side of the bracket opposite to theside against which the mounting flange abuts. AdjustmentV is effected by rotating adjustment screw 42, which is threadedly mounted in a portion 43 ofjthe bracket and which has its lower end mounted-in the adjusting bar at 44.

The milling cutter housing includes, in addition to the spindle housing 3l previously described, a gear case-or housing 46vwhich includes a bottom wall 48, upright walls 49, 50, and '5I and another wallcorresponding toY wall 5I but not shown. The element 41 is closed bya cover 52.

The bottom wall 48 of the gear casehas-adepending hub 54, in which is mounted the spindle housing. The spindle housing'includes a cylindrical upper end portion 55, which is received within an eccentric'bushing 56 in the hub 54, the parts being retained in position by set screws51`.

Mounted for rotation in the spindle housing is av cutter spindle 6U, which has an enlarged lower end 6'I', receivedwithin a bronze bushing-'or-other suitablebearing 62located in a counterbore 6'3 in' the lower end of the spindle housing. The central portion 54 of the spindle is reduced'in size relative to the lower endL portion. and ter.- minates .just short of the upper end of` thespindle housing, wherethe spindle has a secondreduced portion 6.5, which is received within.. and carried by abearing 66 positioned in the bushing 56.\ and at' theupper end of the spindleihousing,

The spindle is centrally bored at` 68- to receive afdrawbar 6'9 which is threaded atr its lowerend for securing tool-holdingelements 1min the Titus;- tro-conical portion 'II at. theV lowerfendiofthe spindle. Any suitable tool, such as the cutting tool 13, may be mounted in the element 10.

A sprocket 15 is keyed to the upper end portion 65 of the spindle and above this is a retaining nut 16 threadedly mounted on the spindle. Above the nut 16 the spindle is further reduced in diameter, terminating in an end 11. A lubricant retaining washer 18 is positioned about the upper end of the spindle and yieldably held against the cover in the region of an opening 19 through which drawbar 69 extends by means of a compression spring 80.

The gear case also houses a countershaft 82 which is mounted in the bearings 83 and 84 in thebottom wall 48 and cover 52 of the gear case, respectively. A sprocket Wheel 85 is keyed to this shaft and operatively connected to the sprocket 15 by chain 86. The countershaft also carries a gear 81 which rotates with the shaft and meshes Iwith a pinion =89 on a pulley shaft 90 carried by bearings 9| and 92 in the gear case bottomwall and cover, respectively. Any suitable number of pulleys 95 may be mounted on the outer end of this shaft, and a selected pulley is connected to a'pulley 96 on the motor 22 by a belt 01.

'i As previously indicated, the motor 22 is preferably adjustably mounted on and carried by the milling cutter housing. This is accomplished by means of a motor bracket which is provided with flanges |0| secured to the bottom wall of the gear case by machine screws |02. The element |00 co-operates with the gear case to provide a rectangular opening |03 for receiving a mounting bar |v on the motor. A set screw |01 is provided for adjustably positioning the motor'with respect `to the gear case.

It will be apparent from the above description that the milling attachment may be readily secured to the cross-feed or the compound rest on the cross-feed of a lathe in a minimum of time. The milling cutter housing can then be adjusted on the mounting bracket. This is accomplished by selecting a suitable hole 3S in the adjusting plate for receiving the bolt 3S of the mounting flange and thereafter making final vertical adjustment by the screw 42. Also, the milling cutter housing may be mounted vertically as shown, or at right angles thereto, by causing the selected set of grooves 33 in the mounting flange 32 to register with the ridges 34 of the mounting bracket.

It will also be apparent that the belt 91 may be .readily changed and the proper adjustment lthereof made by adjustably positioning the motor with respect to the milling cutter housing.

The provision of the eccentric bushing 56 also makes it possible to adjust the slack of the chain 86.

In Figs. 6 and 7 there is shown a modified form of a mounting means for connecting the milling cutter housing and the mounting bracket to secure a greater number of positions of adjustment. In these figures reference numeral 20a indicates the mounting bracket, the leg 26a of which is shown provided with a circular mounting disc l|0 provided with radial serrations on its outer side. The other side of the disc is provided with a pair of parallel grooves |I2 which slide on ribs or slideway |I4 on the face of the leg 26a of the mounting bracket. The mounting flange, indicated by 32a, is formed to provide radial serrations ||5 which mesh with those on part H0. With this construction the parts 32a vand ||0 may be adjustably secured together at any angle within the limit of the serrations.

In Figs. 8 and 9 there is shown another form of the invention wherein the leg 26h of the mounting bracket 20h, is provided with a plate |20 on which is mounted a worm gear vindicated by |2|, which meshes with teeth |22 formed on a circular mounting flange 32h of the milling cutter housing. The plate |20 and leg 26h have interengaging grooves and ribs |2a and ||4a, respectively.V It will be appa-rent that with this device accurate adjustment of the milling cutter on the bracket may be obtained. Any suitable indicia may be provided for indicating the angle of disposition of the parts.

Although the invention has been particularly shown and described, it is contemplated that various changes and modifications can be made Without departing from the scope thereof as set forth in the following claims.

1. In a milling attachment for a lathe having a cross feed, a mounting bracket adapted to be secured to the cross feed of the lathe, a milling cutter housing having a rotatable milling cutter spindle therein, a means for adjustably mounting said housing on said bracket, said means including interengaging elements on said housing and bracket providing a plurality of predetermined positions in which the housing and bracket may be positioned relative to each other and preventing relative rotation thereof when saidhousing and bracket are in a selected position, releasable securing means for holding said housing and bracket in a selected position, said releasable securing means including a vertically adjustable bar and an attachment means for releasably attaching said housing to said bar, and means for vertically moving and accurately positioning said adjustable bar.

2. An adjustable mounting means, comprising a mounting bracket having a slotted leg, an adjusting bar mounted on one side of said leg constructed and arranged for movement thereon longitudinally of the slot in the leg, an element to be mounted on said bracket, said element having a mounting flange, a mounting disc interposed between said leg and said mounting ange, interengaging guide means on said leg and said disc for guiding said disc longitudinally of said slot, interengaging means on said disc and said mounting' flange for adjustably rotatively positioning said bracket and mounting flange with respect t0 each other and bolt means extending through said slot and connecting said adjusting bar and said element.

CHARLES SCI-ILAGEL.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 181,696 Main Aug. 29, 1876 253,314 Richmann Feb. 7, 1882 613,425 Saati Nov. 1, 1898 844,892 Pfander Feb. 19, '1

1,217,949 Jay Mer. 6,1917 1,348,183 Rayuela Aug. a, 1920 1,497,113 Meyer June 1o, i924 1,530,566 Lobbett Mar. 24, 1925 1,974,084 Sarossy Sept. 18, 1934 2,281,353 Hubbard Apr. 28, 1942 2,315,789 Hungerford May 15, 1945 2,386,461 Hellman Oct. 9, 1945 2,453,315 Harbison Nov. 9, 1948 2,500,880 Solomon Mar. 14, 1950 2,502,851 Jones et al Apr. 4, 1950 

